3.7 perpendicular lines perpendicular slopes and equations
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3.7 Perpendicular Lines
Perpendicular slopes and equations
Perpendicular Slopes
Slope of perpendicular lines have opposite reciprocal slopes.
If m1 = -2, then it opposite reciprocal would be ½.
y = - 2x + 3 and y = ½x – 3 would be perpendicular lines
y = - 2x + 3 and y = ½x – 3 would be perpendicular lines
Are the lines Perpendicular?
3,3 1,0 2,5
4,1
Are these lines perpendicular?
12
3
13
2
xy
xy
Are these lines perpendicular?
-2x + 7y = - 4
7x + 2y = 10
Write the equation perpendicular to the line y = 3x – 2 and through the point (3, 4)
The equation represents a mirror.
A ray of light hits the mirror at (3, 1).
What is the equation of the line that is perpendicular to the mirror at this point?
43
5 xy
What are 6 ways to prove lines parallel?
HomeworkHomework
Page 175 – 178 Page 175 – 178
##8 – 50 even8 – 50 even
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